<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>数据统计</el-breadcrumb-item>
      <el-breadcrumb-item>数据报表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片区域 -->
    <el-card>
      <!-- 2.准备一个容器 -->
      <div id="main" style="width: 750px; height: 400px"></div>
    </el-card>
  </div>
</template>

<script>
//1.导入 echarts
import * as echarts from "echarts"
import _ from 'lodash'
export default {
  name: "Report",
  data() {
    return {
      //需要合并的数据
      options: {
        title: { text: "用户来源" },
        tooltip: {
          trigger: "axis",
          axisPointer: { type: "cross", label: { backgroundColor: "#E9EEF3" } },
        },
        grid: { left: "3%", right: "4%", bottom: "3%", containLabel: true },
        xAxis: [{ boundaryGap: false }],
        yAxis: [{ type: "value" }],
      },
    };
  },
  created() {},
  //3.此时页面上的元素已经被渲染完毕了
  async mounted() {
    // 4.基于准备好的dom，初始化echarts实例
    var myChart = echarts.init(document.getElementById("main"));

    const { data: res } = await this.$http.get("reports/type/1");
    if (res.meta.status !== 200) {
      return this.$message.error("获取折线图数据失败！");
    }
   const result=  _.merge(res.data,this.options)
    // 5.使用刚指定的配置项和数据显示图表。
    myChart.setOption(result);
  },
  methods: {},
};
</script>

<style>
</style>